I rarely wash vintage fabric before selling it.
But there are times I do,
When the marks are minor but extensive,
When marks are too hard to explain, or causing damage that needs to be fixed
before I store it further.
I recently bought quite a few vintage dress panels, embroidered and beaded.
They were made in Hong Kong when it was 'the place' to visit.
Sadly lots of this type of fabric - usually satins - don't get stored correctly and
I find a lot with damaging marks from being in plastic bags for 30 years.
I recently washed some, one survived in a usable condition the other not so great.
I think I'm pretty bold when it comes to washing,
I know the risk and sometimes I'm prepared to take it.
Heartbreaking! and worth a go at fixing.
I usually start with wool mix or shampoo
then progress through to tougher stuff if necessary.
Washing vintage fabric can be scary,
and sometimes it backfires.